ABSTRACT

This chapter presents some working categories for the types of analyses that can be accomplished using Geographic Information Systems, and related these categories to the types of questions that can be answered using geospatial data and techniques. Logical queries that use particular spatial logics to select features from a target layer using another source layer as a spatial criterion for the selection can also be constructed. In thematic cartography, the need to generalize large datasets for graphical presentation has been addressed by classification. The notion of proximity is closely related to one of the fundamental principles of geographic thought: W. Tobler's Law, which simply means that "everything is related to everything else, but near things are more related than distant things". The process of buffering and other related location sensitive procedures are the main ways that distance, and more specifically proximity, become analytically operational.